Thickening of the lung veins is a chest imaging manifestation that may indicate respiratory disease, or heart disease, among others. Lung texture is a striated shadow extending from the hilum to the lung field, which is mainly composed of pulmonary arteries, bronchioles, pulmonary veins, and lymphatic vessels. Thickening of lung texture is a manifestation seen in chest X-ray examination. Thickening of lung texture with fewer branches, thinner and clearer edges can be seen in chronic bronchitis and bronchiectasis. If the texture of the lungs is thickened in a reticular pattern, it may be seen in cancerous lymphadenitis or tuberculosis with granulomas. Thickening of lung texture with clear edges and thick, vascular direction from the hilum to the lung field may be seen in atrioventricular septal defect, rheumatic heart disease, heart failure, and arterial ductus arteriosus. It can also be seen in normal people such as the elderly and obese. If the thickening of lung texture is pathological, it should be treated under the guidance of a doctor.